feat: add 'import_values' API endpoint #978

Job	Run time
linting-linux	6s
lint commit message	29s
mypy check on linux (3.8)	57s
pytest on linux (3.8)	1m 27s
mypy check on linux (3.9)	1m 11s
pytest on linux (3.9)	1m 29s
mypy check on linux (3.10)	1m 2s
mypy check on linux (3.11)	1m 14s
pytest on linux (3.10)	1m 34s
pytest on linux (3.11)	1m 25s
mypy check on linux (3.12)	1m 8s
conda package build (and upload if release)	5m 12s
test coverage	4s
build python package	54s
merge current tag to main branch	0s
publish python package	21s
	18m 33s

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